Monitoring the effect of hydrothermal treatments on the structure of a natural zeolite through a combined XRD, FTIR, XRF, SEM and N2-porosimetry analysis

Elaiopoulos, K; Perraki, T; Grigoropoulou, E

dc.contributor.author	Elaiopoulos, K	en
dc.contributor.author	Perraki, T	en
dc.contributor.author	Grigoropoulou, E	en
dc.date.accessioned	2014-03-01T01:33:45Z
dc.date.available	2014-03-01T01:33:45Z
dc.date.issued	2010	en
dc.identifier.issn	1387-1811	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/20577
dc.subject	Acid leaching	en
dc.subject	Dealumination	en
dc.subject	Ion-exchange	en
dc.subject	Modification	en
dc.subject	Zeolite	en
dc.subject.classification	Chemistry, Applied	en
dc.subject.classification	Chemistry, Physical	en
dc.subject.classification	Nanoscience & Nanotechnology	en
dc.subject.classification	Materials Science, Multidisciplinary	en
dc.subject.other	Acid leaching	en
dc.subject.other	Calcination temperature	en
dc.subject.other	Contact time	en
dc.subject.other	Dealumination	en
dc.subject.other	FTIR	en
dc.subject.other	Hydrothermal treatments	en
dc.subject.other	Mordenites	en
dc.subject.other	Natural zeolites	en
dc.subject.other	Porosimetry	en
dc.subject.other	Pure substances	en
dc.subject.other	SEM	en
dc.subject.other	Starting materials	en
dc.subject.other	XRD	en
dc.subject.other	Acids	en
dc.subject.other	Aluminum	en
dc.subject.other	Calcination	en
dc.subject.other	Calcium	en
dc.subject.other	Ion exchangers	en
dc.subject.other	Ions	en
dc.subject.other	Leaching	en
dc.subject.other	Zeolites	en
dc.subject.other	Ion exchange	en
dc.title	Monitoring the effect of hydrothermal treatments on the structure of a natural zeolite through a combined XRD, FTIR, XRF, SEM and N2-porosimetry analysis	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.micromeso.2010.05.004	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.micromeso.2010.05.004	en
heal.language	English	en
heal.publicationDate	2010	en
heal.abstract	A natural zeolite specimen, consisting mainly of heulandite type-II and mordenite, was succumbed to NH4+ and/or H+-exchange followed by one or two calcination steps and further acid leaching. In an attempt to examine the effect of each treatment on the starting material as well as on pre-modified (intermediate) samples, varied calcination temperatures, contact times and solutions concentrations were applied On the grounds of the properties and expected behavior of pure substances, a combined XRD, FTIR, XRF, SEM and N-2-porosimetry analysis enabled the monitoring and comprehension of the phenomena taking place during each treatment, despite the obscurity inherent in each individual analysis when dealing with impure materials. In general, the behavior of the typical counterbalancing tons Na+, K+, Mg2+ and Ca2+, the Fe3+ content, the extraction of Al3+ from the lattice and the removal of amorphous Al-substances were found to be crucial factors concerning the properties of the modified samples (C) 2010 Elsevier Inc. All rights reserved	en
heal.publisher	ELSEVIER SCIENCE BV	en
heal.journalName	Microporous and Mesoporous Materials	en
dc.identifier.doi	10.1016/j.micromeso.2010.05.004	en
dc.identifier.isi	ISI:000280512800005	en
dc.identifier.volume	134	en
dc.identifier.issue	1-3	en
dc.identifier.spage	29	en
dc.identifier.epage	43	en